1999 suburban starting problem

I have the exact same problem you described. it starts, then won't start again, but instead runs one second and stops. I can attempt to start it dozens of times and it still only catches and runs for one second. let it sit for an hour and it starts fine. Is intermittent but getting much worse. once started, it runs fine until I turn it off again. Have you solved it? if so, can you share any info to help me out?

Same problem. I attached a fuel pressure gage because I was being told (repeatedly) it was the fuel pump. However, the pressure was normal, and did not drop too fast when the truck just sits. I don't think it is a fuel pump or regulator. If I figure it out - I'll post it.

Same problem. I attached a fuel pressure gage because I was being told (repeatedly) it was the fuel pump. However, the pressure was normal, and did not drop too fast when the truck just sits. I don't think it is a fuel pump or regulator. If I figure it out - I'll post it.

I have the same problem. It has been happening only since I changed the fuel pump. I can hear it running, so I dont know if its the pump. Mechanic suggested it might be the two rear cylinder injectors leaking. It's around $1200 to replace it, so I'm hoping thats not it. If anyone figures it out, please let me know.I have the same problem. It has been happening only since I changed the fuel pump. I can hear it running, so I dont know if its the pump. Mechanic suggested it might be the two rear cylinder injectors leaking. It's around $1200 to replace it, so I'm hoping thats not it. If anyone figures it out, please let me know.

3 Answers

It is possibly a PASSLOCK problem. Before you start the vehicle, place ignition in RUN and observe the "SECURITY" light. Under normal conditions, it should go out after about 5 seconds. Once the PASSLOCK is activated, the vehicle wil not start for 10 minutes. If you have access to a OBD-II code reader, you will see a code stating a problem with the security feature, code P1626. The problem is most likely a intermittant failure of the contact in the ingnition switch responsible for this signal.

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pumping gas while the engine is running does have any thing to do with what you described. it only risk to have an explosion.
you might have a transmission problem, have your husband check the transmission fluid to see if it has enough and if it smells burnt.

check the catalytic convertor. my 99 with 125k would just stop for no reason and a friend put his hand on the exhaust and told me to hit the gas and he said I had no pressure coming out of the tailpipe. drilled a few holes into the convertor and truck runs perfect again

this sounds like you have a problem with the electric fuel pump sticking, that would be where i would look, when u turn the key on with the windows up do u hear a humming noise for about 3 seconds? if not the fuel pump is the problem.

turn the key to the on pos. and listen for a huming in the rear of the car as your fuel pump is in the tank. if you don't hear it then i would say that the pump is bad and need to be replace, but if you hear it it could be weak . try takeing off the air cleaner and spray some quick start down the intake and try starting it . if it start i would replace the pump . very easy to replace.